期刊
OPTICS EXPRESS
卷 18, 期 26, 页码 27858-27871出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.18.027858
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资金
- U.S. National Science Foundation [PHY-0855632, PHY-0960047]
- NSF [PHY-0240532, EIA-0323623]
- MEXT of Japan
- Division Of Physics
- Direct For Mathematical & Physical Scien [0855632] Funding Source: National Science Foundation
We propose and demonstrate a new method for phaselocking the signal fields emitted above threshold by a nondegenerate, type-II optical parametric oscillator (OPO). This method is based on the observation that amplitude modulation of the pump beam produces a related modulation of the frequency difference of the OPO signals via the temperature-tuning of the index of refraction in the nonlinear crystal. We successfully use pump modulation as a correction for phase-difference locking of the OPO signals and observe a 1 kHz beat note stable over more than 10 s, both figures solely limited by the measurement time. This method eliminates the need for applying electronic phase-correction signals directly to the nonlinear crystal which caused crystal damage in a previous phaselocking technique. (C) 2010 Optical Society of America
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